Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a2d3afd96078e5…

MALICIOUS

PDF

87.8 KB Created: 2021-03-19 17:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f266f1fbb3e96717cc33e6794b3b1a69 SHA-1: 20b16ee1f54a5b322f24d1e5dbeb21d77a69249e SHA-256: f1a2d3afd96078e5e60ba751df1f313792f4fd22d3365e49ea8dbb6fb538f018
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that leverage embedded links to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/award?keyword=calendar+2020+malaysia+public+holiday+pdf PDF link annotation
    • https://wolaserirefuf.weebly.com/uploads/1/3/1/6/131637046/rikenesozulevu.pdfIn PDF document text
    • https://woxufojobufuv.weebly.com/uploads/1/3/0/7/130739326/7599693.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/kolejipan.pdfIn PDF document text
    • https://puxupukesif.weebly.com/uploads/1/3/0/8/130813524/9103431.pdfIn PDF document text
    • https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/8fc86.pdfIn PDF document text
    • https://minawitagolufu.weebly.com/uploads/1/3/5/3/135312922/9746242.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/xifokol_befixo_gufezusolegeda.pdfIn PDF document text
    • https://sulakupewub.weebly.com/uploads/1/3/1/0/131070695/398722.pdfIn PDF document text
    • https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/baraxilax.pdfIn PDF document text
    • https://vifaniju.weebly.com/uploads/1/3/4/5/134507083/3320243.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/6610117.pdfIn PDF document text
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/sudobujigun.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/f9ce8d7d76252.pdfIn PDF document text
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/8708048.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/6806813.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/xukemerex.pdfIn PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/belebefobibow_mevokifuxa_kuxorarexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bebubizaguwadef.rf.gd/dezisijexigirajego.pdfIn PDF document text
    • http://nolusiwafaki.epizy.com/muvafupa.pdfIn PDF document text
    • http://noxonot.rf.gd/87536576310.pdfIn PDF document text
    • http://moliposapivar.epizy.com/formeln_ausgleichen_chemie_bungen.pdfIn PDF document text
    • http://vawapod.rf.gd/toxebu.pdfIn PDF document text
    • http://jimatisejur.rf.gd/nutrition_an_applied_approach_5th_edition_free.pdfIn PDF document text
    • http://lamoren.rf.gd/kukozum.pdfIn PDF document text
    • http://vesuduw.epizy.com/lawn_boy_gold_series_2_cycle_lawn_mower_parts.pdfIn PDF document text
    • http://jiwenufaxo.epizy.com/free_2d_intro_templates_after_effects.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 5736 bytes
SHA-256: bfe28857fd7fa993043a9d77654ac3b6a1b12b901c4f2e34cc298bb38349be8e
font_01_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 2292 bytes
SHA-256: e26eac9065c9a76012017d219ce8b42f0c29ef93da3aa8ee3091f7f7e10bb9f4
font_02_sfnt_off0001191b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191B 11620 bytes
SHA-256: d63e5a56bc471ddaa6b94de700996e3e10aef2fc80052e2be3e73132b49c79ed
font_03_sfnt_off00014083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14083 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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